The distribution network (DN) is characterized by wide coverage and highly scattered data distribution. To improve the business process and data calculation capability for DN management, a foundational computing technology, the wide-area distributed sinking calculation technology (W-A DSCT), is proposed based on the application of big data, artificial intelligence, block chain and other technologies. It is applicable to the OCMS (operation, control and maintenance) of distribution networks. The technology adopts the concept of “moving computation, not moving to data” to realize fast processing of business applications. The algorithm and business logic are designed at the primary node level, and the algorithm compilation and data crawling and mining are performed at the sub-node level to realize the fast business response. This paper introduces the technical implementation methods and technologies of each link, and performs a comparative analysis for typical business scenarios between the sinking calculation scheme and the original framework calculation. It is verified that applying the sinking calculation scheme can significantly enhance the rapid processing ability and computational efficiency.